package sicket;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

public class ServeDemo {
    private ServerSocket serversocket;
    private List<PrintWriter> allOut=new ArrayList<>();
    public ServeDemo(){
        try {
            System.out.println("创建服务端");
            serversocket=new ServerSocket(8089);
            System.out.println("成功创建服务端");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void start(){
        try {
            while (true){
                System.out.println("等待客户端链接");
                Socket socket=serversocket.accept();
                System.out.println("一个客户端连接了");
                ClientHandler handler=new ClientHandler(socket);
                Thread t=new Thread(handler);
                t.start();
            }

        } catch (IOException e) {
            e.printStackTrace();
        }



    }

    public static void main(String[] args) {
        ServeDemo serveDemo=new ServeDemo();
        serveDemo.start();
    }

    class ClientHandler implements Runnable{
        private Socket socket;
        private String host;
        public ClientHandler(Socket socket){
            this.socket=socket;
            host=socket.getInetAddress().getHostAddress();
        }
        public void run(){
            PrintWriter pw=null;
            try {
                InputStream ins = socket.getInputStream();
                InputStreamReader isr = new InputStreamReader(ins, StandardCharsets.UTF_8);
                BufferedReader br = new BufferedReader(isr);
                String line;


                OutputStream out=socket.getOutputStream();
                OutputStreamWriter osw=new OutputStreamWriter(out,StandardCharsets.UTF_8);
                BufferedWriter bw=new BufferedWriter(osw);
                pw=new PrintWriter(bw,true);
                synchronized (allOut){
                    allOut.add(pw);
                }

                System.out.println(host+"上线了,当前人数为"+allOut.size());


                while ((line=br.readLine())!=null){
                    System.out.println(host+"说"+line);
                    synchronized (allOut){
                        for (PrintWriter o:allOut){
                            o.println(host+"说"+line);
                        }
                    }

                }
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    synchronized (allOut){
                        allOut.remove(pw);
                    }
                    System.out.println(host+"下线了,当前在线人数为:"+allOut.size());
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
